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Old 02-25-12 | 11:20 PM
  #9  
FBinNY
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Joined: Apr 2009
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From: New Rochelle, NY

Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter

Originally Posted by HillRider
Wrap a strip of paper around the bars at the widest diameter near the stem and mark the over lap with a pen. Then measure the distance between the marks. A 25.4 mm bar will have the marks 79.8 mm apart and a 31.8 mm bar will have the marks 99.9 mm apart.
+1, this is straightforward, easy to do without special tools, and plenty accurate for the job. The other option is to put a ruler next the stem. You should be able to easily eyeball the difference between 1" and 1-1/4".
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